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(.No Modelj C. IHELE. i A SECURING RANK ARMS T0 SHAFTS- N0 512,529. l l Patented'Jan. 9, 1894.

' UNITED 'STATES PATENT Ormea.

.CHRISTIAN AICHELE," oF PHILADELPHIA, PENNSYLVANIA, fission-on Torun NORTH BROTHERS MANUFACTURING COMPANY, OF SAME PLACE.

SECURlhlG' CRAN'K-A'RMS TO SHAFTS ,a-islncxricwton forming parc of Letters Ps1-.ent No. 512,529, dates January s, isos.-

)Application filed nay 22,1893. sensi no, 475.122. '(Nnmoaei.)

, To'iL/vhom it may concern: A

Be it. known that i, CHRISTLAN AICHELE, a

I citizen of the United States, residing in Philap tion.

delphia, Pennsylvania, 'have invented 'certain Improvements in-Securing Crank-Arms. to Shafts, of which the following is' a specifica- The object ot" my invention is to provide means whereby acrank armor handle can be readily secured lto or released from a shaft, and this object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure l, is a side view o f part of a shaft and crank arm with securing device therefor' constructed' ip accordapcewithmy invention, the crank arm beingsecured tothe shaft.

,Fg. 2,isan end view of Fig. 1. Fig. 3, is a View similar to`Fig. 1, but showing the crank arm unlocked froml the shaft. Figfet, is an end view of Fig. 3. Fig. 5, is a.sectional view illustratinga minor feature of the invention; and Figs. 6, 7 and 8,' are sectional views illustrating modifications of the invention.-`v

A represents part of a shaft and B part of a crank arm or handle applied to the end of the same, the end portion of the shaft being tapered and also-flattened at one side and the opening in then crank arm being correspondingly shaped so thatthe crank arm is prevented from turning independently of the shaft' and can only be `forced onto the same to a certain definite extent owing to the taperf ing of the end of `the shaft and of. the opening in the crank arm. lIn order to secure the crank arm to the shaf t, therefore, it is only necessary to prevent outward movement of said crank arm and itis usual tov accomplish this result by means of a thumb screwhaving a threaded stem adapted to a threaded opening in the end ofthe shaft and an enlarged head bearing upon the outer face of the crank arm.

In many classesot" machines, such as meat cutters, and the like, it is.necessary to frequently remove and' apply the crank arm at crank arm can be taken oil. ln order to over-z come this objection I provide the crank arm with a swinging vcatch D hung `to the arm by means of a pin, screw, or rivet cz andadapted to engage with the shaftv orwith a. shoulder formed on or carried by said shaft so as to 55 prevent longitudinal movement of the crank arm on the shaft.

In the construction shown in Figs. 1 to 'the shaft carries a thumb sc'rew F having a -lease thecrank arm, for the head of the thninh screw is less in diameter than the opening in 7cx the crank, ,so that when the pivoted catch D i's swung back, as shown in Figs. 3 and 4, the crank arm can be readily slipped o over the 7 head of the screw, but when the catch is swung down hetweenthe'outer face of the 75 crank arm and the shoulder formed by the head of the thumb screw, as shown in Figs. l and 2, longitudinal movementof the crank arm is et'fectually preventedf The retaining screw may, it' desired, be 8c screwed up to a shoulder i, as shown in Fig. 6, and may remain permanently in position so as to :formagroove for the reception of the swinging catch and a shoulder constituting the outer bearing for said catch, or such 85 groove may be formed directly in the shaft or the catch may simply bear upona curved or other seat formed upon the projecting end. of the shaft, as shown for instance at D'in Fig. 7, the faces of the catch and seat in this 9o case being, by preference, slightly eccentric, one in respect to the other, so that the catch can be jammed so tightly against the seat as to prevent accidental displacement and preclude the slipping of the crank armsoutward 95 Aon the shaft. A sliding catch may also be substituted for the swinging catch if desired, as shown for instance at D2 in Fig. 8, although the swinging catch is preferred.

llaving thus described my invention, I loc claim and desire 2 --v wir@ by Letters .Pnt-

ent-

1. The combination of the ornni; handle: :L shaft having amporing sont for the suine and having also beyond sind crank handle a contracted neck and nn outer shoulder, said shouldered portion being lees in size than the opening in the Crank handle, means for preventing turningr of tne handle on the shaft, und n entoh mounted nnon the outer face of the crunk handle :ind mom-thin into sind ont of the reeess formed hy the eontrnoted neck and ontor Shoulder ol" the slntft so :Ji to oonine or release the crank handle, snhstnntinlly as specified.

il. 'lho combination of the shalte nernnk arm or handle adapted to said shaft, hut in- Cnpunle of turning thereon, n movable ein eh mounted on the outer face of the erstnl; :i1-ni, and Yat thumb screw adapted to an opening in the end oi the shaft and having heed leas i the crank in diameter than the openingr ot' uur., unid hond serving by contant with the movable catch on the crank arm to retain the latter longitudinally on the shafqsnbstnnt-ally es specified.

3. 'lheeoinhnation of the shaft, the crunk arm or handle adapted. to .Vit tightly on said shaft and incapable of turning thereon, :L l movable catch mounted on'the of the or'nnlc arm, a thumb screw adapted to n threaded. opening in the end of the slm/ft l and having n hond hearing upon said enteh but less in diameter thon the openingr in the ornnh arm, and menus for preventing the detaching of Suid thnnil) screw from the shaft but permitting u Slight turning movement ol` the saine, substantially as speeilied.

In testin'xoi'ly whereof .I hmfe signed my naine to thisSpecification in the presence ol` two Snhnribin witnesses.

miniem-IAN Meinem.

outer face 

